count mongodb in php

Question

I have a collection user which has 2 parameters (Username,paid), username is a string and paid is a string too, i should count how many users with the parameter paid="true"

this is my try

<?php

$connection = new MongoClient();
$collection = $connection->Ahmed->user;

$cursor = $collection->find();
var_dump($collection->count());
var_dump($collection->count($cursor->paid=>"true")));
?>

if there is an expert in mongo could help, thanks :)

Solution

The new driver does not implement $cursor->count() use $collection->count() instead

$collection->count($filter)

in your case: $filter = array('paid' => 'true')